Walker Products 250-24128 rear oxygen sensor for the 2001-2005 Mazda Miata 4-cylinder 1.8L and other vehicles measures the oxygen left in the exhaust gas. The Walker Products oxygen sensor is made for its specific application and fitment position, and it gives the ECU the diagnostic feedback it requires.
- Electrodes coated with a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Determines the oxygen content of the exhaust gas to monitor the air-fuel ratio for combustion efficiency
- Narrow-band sensor with a 4-wire connection
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-24128 oxygen sensor
- Fits: 2001-2005 Mazda Miata 4-cylinder 1.8L and other vehicles
- Position: Upstream, downstream, downstream rear
A failed sensor can show up as poor running, higher fuel consumption or a lit malfunction indicator light, though those signs have other possible sources. Before replacing it, look over the sensor, its wiring harness and the connector for physical damage with the engine off and cool.
Fits
This listing is one sensor, and the fitment lists one per application. It is listed for a wide range of Mazda and Kia models, including an oxygen sensor for the 2001-2005 Mazda Miata 4-cylinder 1.8L, the 1995-2002 Mazda Millenia V6 2.3L and 2001-2002 Millenia V6 2.5L, and the 1995-1998 Mazda Protege 4-cylinder 1.5L. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Position: Upstream, downstream, downstream rear
- Quantity per application: 1
Build and materials
- Type: narrow-band, 4-wire
- Electrodes: gas-permeable platinum layer
- Coating: protects electrode surfaces from contamination and erosion
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right Miata O2 sensor for a 2001-2005 Mazda Miata 4-cylinder 1.8L?
Yes. Walker Products 250-24128 is listed for the 2001-2005 Mazda Miata 4-cylinder 1.8L, and the fitment lists one sensor per application. Use the "Vehicles it fits" section to check other models.
Is this rear oxygen sensor narrow-band or wideband?
It is a narrow-band sensor with a 4-wire connection. It measures the oxygen content of the exhaust gas to monitor the air-fuel ratio.
What are the electrodes on this oxygen sensor coated with?
The electrodes are coated with a gas-permeable platinum layer. A further coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust.
What can a failing 4-wire oxygen sensor cause?
Poor running, higher fuel consumption or a lit malfunction indicator light can all come from a failed sensor, though other faults can cause them too. A shop can read the stored fault codes.
Does the Walker Products 250-24128 help with fuel economy and emissions?
Yes. The 250-24128 monitors the exhaust gases to help reduce pollutants, and it measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy.
